Laguna Watrine Laboratory 23 
Family LAMNIDAE 
Lamna cornubica (Gmelin). Mackerel Shark. 
(Plate Il, Figure H) 
One specimen, 414 feet long, taken about ten miles southeast of 
Laguna in a barracuda drift net on July 26. This species is not re- 
corded by Starks and Morris, but is said to be, ‘‘not rare in Califor- 
nia,’’? (Jordan and Evermann, Fishes of N. and Mid. America, Vol. 
I, p. 49). The specimen taken near Laguna was brought ashore and 
kept for some time, so there can be no question as to the identity. 
The accompanying photograph shows the general appearance of the 
fish. 
Family SQUATINIDAE 
Squatina squatina (Linnaeus). Angel Shark. 
Several specimens of this species were taken by the fishermen in 
rather deep water off Newport. 
Family RHINOBATIDAE 
Rhinobatus productus Ayres. Shovel-nose Shark, Guitar Fish. 
(Figures 1 and 2, and 2 A) 
This was the most common ray found in the vicinity of Laguna. 
At Newport Beach a favorite sport of the ‘‘Sunday fishermen’’ is 
catching these large rays from the pier, where numbers take the bait 
and are hauled up every day. 
The following notes were taken on a female specimen four feet 
long. Measurements in hundredths of body length. Snout to pos- 
terior apex of pectoral, 38; snout to ventrals, 18; snout to first dorsal, 
59; distance between dorsals, 1014; tip of snout to vent, 41; breadth 
across pectorals, 34; height of first dorsal, 7.3; second dorsal same; 
length of abdominal cavity, 19.5. The abdominal cavity is very broad, 
the anterior two-thirds being nearly square. Posteriorly it narrows 
decidedly, both dorso-ventrally and laterally, due to the intrusion of 
the vetebral column and pectoral fin cartilages. This shape is well 
shown by the outline of the viscera in the accompanying figure 
(Figure 1), which is taken from this specimen. Figure 1 shows. the 
viscera entire, in its natural position as found in the body eavity. 
Figure 2 represents the same with the various organs separated from 
one another sufficiently to show their individual forms. The ali- 
mentary canal is severed just in front of the liver. In Figure 1 a 
somewhat distorted appearance is given to the viscera by the en- 
larged oviducts, each of which is swollen with a well developed egg. 
The liver is trilobate, the lateral lobes extending a short distance 
