MORSE: OBSERVATIONS ON LAMELLIBRANCHS. 
185 
Fio. 38. — Cumingia tellinoides (Conrad). 
syphons, the openings, and other features indicate that Cumingia 
should be placed in the same family with Tellina and Macoma. 
SOLEN ENSIS Linn6. 
Fig. 39. Length, 124 mm. 
This species is unquestionably different from the English 
species but might easily be considered a geographical variety. 
The syphons are separated at their ends for a short distance, are 
broad, filling up the entire end of the shell; the branchial syphon 
is the broader. Verrill has given an excellent description of the 
animal in his Invertebrate Animals of Vineyard Sound; the 
figure, however, is very poor. The opening of the branchial 
syphon is fringed with papillae of three definite sizes. The 
larger ones are dilated in the middle like a lanceolate leaf. At 
the base on each side are light brown markings and there are two 
lunate markings on the face of each papilla (Fig. 39, a) ; between 
these are much smaller papillae of equal length flanked on each 
side by exceedingly minute ones; below these are a number of 
much larger papillae of various sizes; these are continually 
twirUng individually and turning back suddenly. They are 
