NEW YORK SHELL CLUB NOTES No.2 June-July-Aug. 1977 Page 9 
be i Pinaceae eae from species to species. Of those stud- 
ied, C. ermineus en called C. ranunculus), was the only species 
with radula teeth matching the structure type found in the venomous 
c. striatus Linné from the Indo-Pacific. ~~ 
In contrast, the other three species of cone were very bold 
; : placid; the 
ae ae hats ole mollusks in the aquarium. The fragile Eien 
ranch, Tridachia crispata Mo6rch, climbed over Conus aurantius with- 
out being disturbed by the cone. 
Conus aurantius is found only in the Netherland Antilles. At first 
glance it resembles Conus regius; however, it is quite slender, and 
the spire is more elongate and lacks the strong nodules which char- 
acterize regius. The animal is bright orange to red, matching the 
basic color of the shell. It would be interesting to compare its 
radula with that of the common regius. I would suspect that, like 
regius, the teeth of aurantius possess a spur at the base, which is 
Characteristic of cones that feed on tube-dwelling polychaete worms. 
All specimens were found in water less than 25 feet deep, most in 
10 feet or less. Unfortunately, collecting of shells has recently 
been outlawed on Aruba, Bonaire and Curacao. 

(For other items on Conus see NYSC NOTES NoS 152:4, 230:3-5, 231:2) 

NOTES ON THE SPAWNING OF UROSALPINX AND GEMMA 
and a Settling of Barnacles 
On a field trip to a North Haven beach April 2nd, Linda Springer col- 
lected a few oyster drills, Urosalpinx cinerea (Say), to observe in 
an aquarium. She placed the aquarium in a finished room in the base- 
ment where temperatures were a few degrees lower than in the main 
rooms of the home, as the water from which the snails were collected 
was still quite cool. Mating was observed April 13, and deposit of 
egg capsules commenced April 15. The eggs developed and viable young 
hatched over a four day period, June 5-8, after an incubation of 51- 
55 days. When observed June 8th the females were depositing new 
clusters of egg capsules, these deposits also starting two days after 
mating was observed. 
On April 12th the Raeihles visited Center Island Beach at Bayville 
to explore the flats onaa very low tide. There were numerous mud 
snails, Ilyanassa obsoleta, but no egg cases of this or any other 
species. These with some periwinkles, Littorina littorea, and blue 
mussels, Mytilus edulis, were the only live mollusks found on the 
Sound beach. But new barnacles were everywhere; they ranged from 
1 mm to 24 mm, with settling larvae in between them. At these stages 
the young barnacles and those in the late cyprid stage are a rusty 
red in color, and they coated the normally dull rocks until they ap- 
peared as red sandstone. 
Moving across to the Bay, 
gemma (Totten). They were 
screening yielded 8 adult (to 5 mm) Gemma 
kept in sea water at room temperature 
and within hours started to deliver young: first day, one; next day, 
fifteen; then there were fifty -- and by the end of ten days there 
were too many to count. The young measured .3 mm across their trans- 
parent, glassy shells; the siphon and foot showed shadowy white. 
Th over two weeks. 
ey remained active for Dorothy Raeihle 
