2492 E. J. ALLEN. 
Clark refers to specimens appearing in August and September which 
he thinks are quite distinct from 7. gurnardus and T. hirundo, and have 
very little pigment. These he regards as probably belonging to the 
species 7’. lineata. A few specimens amongst the 1914 material, which 
I have included under the gurnardus type, very closely approach the 
forms which Clark thus regards as 7’. lineata, the amount of pigment on 
the pectoral fins being small, although the fins are long. The variation 
in the amount of pigment seen in preserved material, especially when 
the preservation is not very good, is considerable, and seems to me to 
make it impossible to assign every specimen to a particular species with 
any degree of certainty until some more definite character can be used 
for purposes of investigation. 
It must be borne in mind too that the species which as an adult is 
perhaps the most numerous on the grounds in the neighbourhood where 
most of the hauls have been made is 7’. cuculus, and so far as I am aware 
the young stages of that form have never been recognised. It is possible, 
therefore, that this species may be included amongst the forms with long 
pectorals pigmented on the posterior half, which are here included under 
Trigla sp., and amongst those which Clark recorded as 7’. gurnardus. 
A fourth species, 7’. lyra, is occasionally found in the western part of the 
English Channel, concerning the young stages of which nothing is known. 
Unfortunately the numerical characters, such as number of fin rays 
and vertebrie, of these gurnards are all so similar that they cannot be 
used for discriminating the species in these young stages. 
TABLE XXXVIII. 
REcoRD OF TRIGLA SP. 
Trigla sp. T. hirundo. 
No. of haul. Date. Depth. No. Sizeinmm. No. Sizeinmm. 
TXO(5)) Sdbey dae ee 3 7-529-5 c4 
X. 19.v.14 M. 53 4-5-11-7 — oss 
ae 7 g. 39 6-95 2 = 
XT. F S 8 5-1-10 a 
Th . M. 13 6-82 [eae 
Aha © 22 ye: — 9 75-10 — = 
XIV. 25.v.14 M. 45 5:5-13 aa = 
XV. 25.v.14 S. 33 7-2-1255 — se 
XVI. P S 41 5 po12 le 
eV 3.v1.14 B reel 5-115 = — = 
XVIII. 7 B 63 55-18 1 eae 
Xie 4 M 15 G25) at ee 
